WO2003075557A1

WO2003075557A1 - Image pickup device and chromatic aberration correction method

Info

Publication number: WO2003075557A1
Application number: PCT/JP2003/002589
Authority: WO
Inventors: Miyuki Okada; Ken Nakajima
Original assignee: Sony Corporation
Priority date: 2002-03-05
Filing date: 2003-03-05
Publication date: 2003-09-12
Also published as: KR20040089699A; TWI234394B; JP2003255424A; JP4000872B2; CN100384221C; US20050168614A1; KR100957261B1; US7397499B2; EP1489836A4; TW200304325A; CN1650614A; EP1489836A1

Abstract

Quality deterioration caused by a small-sized pickup lens can be corrected by a processing of a picked up image signal and can perform preferable correction when performing camera shake correction. An output signal from a camera signal processing circuit (4) is selected by a selector switch (5) and supplied to a chromatic aberration correction unit (6). On the other hand, an angular speed by camera shake is detected by using sensors (7P, 7Y) and supplied to a camera shake correction vector calculation unit (9). Moreover, a drive state of a pickup lens (1) is supplied to a conversion ratio calculation unit (10). The shift vector at the center of the optical axis of the pickup lens (1) is calculated from the camera shake correction vector and supplied to the chromatic aberration correction unit (6). Moreover, the conversion ratio for each color is supplied to the chromatic aberration correction unit (6). Furthermore, the signal which has been corrected by the chromatic aberration correction unit (6) is compressed and supplied to a recording/reproduction device (17) to a recording medium. Moreover, the reproduction signal from the recording/reproduction device (17) is decompressed and supplied to the selector switch (5).

Description

Specification

Image capturing apparatus and chromatic aberration correction method

The present invention relates to a two-image imaging apparatus and a chromatic aberration correction method capable of satisfactorily correcting chromatic aberration that occurs when, for example, imaging video light that has passed through a photographic lens. The present invention relates to an image capturing apparatus and a chromatic aberration correction method suitable for use in a digital still camera. Background art

For example, in the case of a video camera or a digital still camera, a photographic lens, imaging means for converting image light passing through the photographic lens into an electric image signal, and camera signal processing for processing the image signal Means is provided, and an output signal from the camera signal processing means is output to the outside or recorded on a recording medium.

Here, a so-called optical lens is used as the taking lens. Then, the image light from the subject passing through the photographing lens is separated into three primary colors of red (R), green (G), and blue (B) in a spectral filter, for example, such as a CCD or CMOS sensor. An image is formed on an image pickup surface of an image pickup means, and is converted into an electric image signal.

On the other hand, video cameras and digital still cameras have been rapidly reduced in size, and there has been a demand for smaller photographic lenses. For this reason, the miniaturization of photographic lenses is increasingly replaced by one or a small number of small lenses instead of the conventional combination of many lenses. However, such miniaturized photographic lenses have so-called chromatic aberrations. It is difficult to sufficiently suppress the image quality deterioration caused by the lens. That is, in an optical lens, for example, since the refractive index of the lens differs depending on each wavelength of red (R), green (G), and blue (B) separated by a spectral filter, as shown in FIG. At the same time, for the green (G) image, the red (R) image is connected to the outside and the blue (B) image is connected to the inside. For this reason, for example, even a black-and-white subject has a problem that color blur (color shift) occurs at the edge of the image. Therefore, such color blur and resolution degradation due to chromatic aberration of magnification (also referred to as lateral chromatic aberration) are caused. In the past, in order to suppress image quality degradation, many lenses were combined to make corrections inside the taking lens. However, it is difficult for the miniaturized imaging lens as described above to sufficiently suppress such image quality deterioration only by the imaging lens.

On the other hand, as a means for suppressing image quality deterioration such as color blur and resolution deterioration due to the chromatic aberration of magnification as described above, for example, an apparatus disclosed in Japanese Patent Application Laid-Open No. 53568/1993 has been previously proposed. ing.

In other words, in the device disclosed in this publication, video signals for each color of R, G, and B taken out from a CCD (image pickup device) are temporarily converted into digital data and stored in individual field memories. Based on the driving status of the shooting lens, such as the zoom focal length and focus position, the entire field memory is individually vector-enlarged and scaled, and then each image is enlarged and reduced. By synthesizing R, G, and B again, color shift generated by the camera lens of the video camera is corrected.

In the case where a small video camera or digital still camera is used, for example, for photographing with a hand, there is a possibility that an obstacle such as vibration of an image due to a so-called camera shake may occur. So like this In order to remove obstacles such as image vibration, small video cameras or digital still cameras are equipped with a so-called image stabilization device. FIG. 5 shows a block diagram of a video camera or a digital still camera equipped with such an image stabilizer.

In this FIG. 5, image light from a subject (not shown) is imaged on an imaging surface of an imaging means 51 composed of a CCD, a CMOS sensor, or the like through an imaging lens 50, for example, a luminance (Y) signal. Is converted into an electrical image signal consisting of the two color difference (Cb, Cr) signals. This image signal is supplied to the camera signal processing circuit 52.

Then, signal processing such as so-called correction is performed to form a normal image signal used in general-purpose video equipment. On the other hand, in order to detect so-called camera shake, here, for example, two gyro sensors 53P and 53Y are used to detect the pitch (Pitch) and the angular velocity due to the camera shake in the yaw (Yaw) direction. . Further, the zoom focal length of the photographing lens 50 operated by the user is detected from the photographing lens 50, for example. Note that the zoom focal length may be detected using, for example, an operation signal from a manual operation input unit 54 from a user.

The angular velocity signals detected by the gyro sensors 53P and 53Y are supplied to high-pass filters (HPF) 55P and 55Y to remove the direct current component. The data is supplied to a table 56, from which the necessary operation coefficients are obtained, and the operation coefficients are supplied to multipliers 57P, 57Y, so that the data is calculated. Signals from the 55 P and 55 Y are multiplied. In addition, the output signals of multipliers 57 P and 57 Y are output to integrators 58 P and 58, respectively.

Supplied to Y.

Therefore, from these integrators 58 P and 58 Y, angle information of the photographing lens 50 fluctuated by camera shake is extracted. There The camera shake angle information is supplied to, for example, the image pickup means 51 through the limiter circuits 59 P and 59 Y, and the position where the image signal from the image pickup means 51 is extracted is controlled. That is, for example, the imaging means 51 is provided with an imaging surface wider than the original image size, and an image necessary for canceling the fluctuation due to camera shake is taken out of the imaging surface.

Thus, in a small video camera, a digital still camera, or the like, so-called camera shake correction is performed. As means for performing camera shake correction, in addition to the control of the extraction position of the image signal from the imaging means 51, the image signals captured by the imaging means 51 are temporarily stored in the memory 60. In addition, a method of controlling a reading position of an image signal from the memory 60 and a method of shifting and correcting a part of the lens of the photographing lens 50 are also implemented.

As means for extracting the angle information of the photographing lens 50 fluctuated by camera shake, in addition to the means using the gyro sensors 53P and 53Y, for example, as shown in FIG. 5 The image signal from 1 is stored in the frame memory 61, and the image signal before and after this frame memory 61 is compared by the comparison circuit 62. Can also be calculated. The calculated camera shake angle information can be used in all of the above-described camera shake correction means.

However, in the case where such camera shake correction is performed, if an attempt is made to correct image quality deterioration such as color blur due to chromatic aberration of magnification or resolution deterioration using the apparatus disclosed in the above-mentioned publication, sufficient compensation is required. It proved impossible to do the right thing. That is, in the above-described apparatus, when the entire field memory is individually vector-moved, the center of the field memory is made coincident with the optical axis of the photographing lens. The position of the optical axis is moved to match the center It becomes difficult.

For this reason, conventionally, it has not been possible to simultaneously perform correction of image quality deterioration such as chromatic aberration and camera shake correction. However, in conventional models with a small number of pixels, image quality deterioration such as chromatic aberration was hardly noticeable especially in shooting involving camera shake correction. However, in recent years, as the number of photographed pixels has been required to increase, the effects of image quality deterioration such as chromatic aberration have become remarkable in all situations.o

The present application has been made in view of such a point, and the problem to be solved is that, with conventional means, color blur and resolution degradation due to chromatic aberration of magnification due to downsizing of a taking lens and the like. It is difficult to sufficiently suppress such image quality degradation using only the taking lens.In particular, to correct such image quality degradation, enlarge or reduce the image for each color. However, if this is done, there was a problem that camera shake correction could not be performed at the same time. Disclosure of the invention

Claim 1 of the present invention provides a detection output using a means for enlarging or reducing an image for each color of a primary color signal and a means for detecting a driving state of a photographing lens and a camera shake correction amount. According to this, the conversion coefficient of the enlargement or reduction of the image and the coordinates of the optical axis center are controlled.

This makes it possible to correct image quality degradation caused by a miniaturized photographing lens by processing the photographed image signal, and

However, even when the image stabilization is performed at the same time, it is possible to perform a good correction process.

According to claim 2 of the present invention, the resolution conversion means Signal conversion means for converting or inverting these output signals to an external output or image signal for recording, an external output means for outputting an image signal for external output, and recording an image signal for Z or recording By providing recording / reproducing means for recording / reproducing on a medium, the corrected image signal can be recorded on a recording medium such as a flexible disk or a semiconductor memory card, or can be used for external video equipment etc. It can also be output.

According to claim 3 of the present invention, the output signal from the camera signal processing means can be recorded on the recording medium by the recording / reproducing means, and the driving of the photographing lens detected by the detecting means at the time of the photographing is performed. By recording information on the state and the amount of camera shake correction together with the output signal from the camera signal processing means on a recording medium, it is possible to record good image signals even when there is no time to perform correction processing in continuous shooting etc. Can be done.

According to claim 4 of the present invention, there is provided switching means for switching between an output signal from the camera signal processing means and an image signal from any external input means or recording / reproducing means, and The signal is supplied to the color signal conversion means, and the control means is provided with a user interface for making arbitrary settings for the conversion coefficient for enlargement or reduction and the center coordinate of the optical axis. The correction process of the image signal recorded by the camera device can be performed well.

According to claim 5 of the present invention, the recording medium reproduced by the recording / reproducing means includes, together with the image signal, the driving state of the photographing lens and the amount of camera shake detected by the detecting means at the time of photographing the image signal. By controlling the conversion coefficient for enlargement or reduction by the resolution conversion means and the coordinate of the optical axis center according to the information reproduced by the recording / reproduction means, the recording medium is recorded using the same camera device. Recorded on Thus, the image signal can be satisfactorily corrected.

Further, claim 6 of the present invention uses a means for enlarging or reducing an image for each color of a primary color signal, and a means for detecting a driving state of a photographing lens and a camera shake correction amount, According to the detection output, a conversion coefficient for enlarging or reducing the image and the center coordinate of the optical axis are controlled.

As a result, it is possible to correct the image quality degradation caused by the miniaturized photographing lens by processing the photographed image signal, and to perform a good correction process even when performing camera shake correction at the same time. Things.

According to claim 7 of the present invention, the output signal from the resolution conversion means is converted into an image signal for external output or recording, and an image signal for external output is output. And / or by recording the image signal for recording on a recording medium, the corrected image signal can be recorded on a recording medium such as a flexible disk or a semiconductor memory card, or can be recorded on an external video device or the like. According to claim 8 of the present invention, it is possible to record an output signal from the camera signal processing means on a recording medium and to drive a photographing lens detected at the time of photographing. By recording the information of the state and the amount of camera shake correction together with the output signal on a recording medium, it is possible to record a good image signal even when there is no time for performing the correction processing in continuous shooting or the like. It is.

According to claim 9 of the present invention, there is provided switching means for switching between an output signal from the camera signal processing means and an image signal from an arbitrary external input or a recording medium, and the signal from the switching means is reduced. At least three primary color signals are converted, and the image is enlarged or reduced for each color of the primary color signal, and the conversion coefficients for expansion or reduction and the optical axis By making arbitrary settings for the center coordinates, it is possible to satisfactorily correct the image signal recorded by another camera device.

According to claim 10 of the present invention, the recording medium is recorded with the image signal and the information on the driving state of the photographing lens and the amount of camera shake correction detected at the time of photographing the image signal, and is reproduced. By controlling the conversion coefficient for enlargement or reduction and the center coordinate of the optical axis in accordance with the information, the image signal recorded on the recording medium can be satisfactorily corrected using the same camera device. Things. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a block diagram showing a configuration of an embodiment of a video camera or a digital still camera to which the image photographing apparatus and the chromatic aberration correction method according to the present invention are applied.

FIG. 2 is a block diagram showing a configuration of an embodiment of the main part.

FIG. 3 is a diagram for explaining the operation.

FIG. 4 is a diagram for explaining chromatic aberration.

FIG. 5 is a block diagram for explaining conventional two-camera shake correction means.

FIG. 6 is a diagram for explaining the best mode for carrying out the invention.

In the present invention, the means for enlarging or reducing the image for each color of the primary color signal and the means for detecting the driving state of the imaging lens and the amount of camera shake correction are used to enlarge or reduce the image in accordance with the detection output. In this case, the conversion coefficient and the optical axis center coordinate are controlled. Correction can be performed by processing the shadowed image signal, and good correction processing can be performed when camera shake correction is performed at the same time.

Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 shows the configuration of an embodiment of a video camera or a digital still camera to which an image capturing apparatus and a chromatic aberration correction method according to the present invention are applied. It is a block diagram '.

In FIG. 1, image light from a subject (not shown) is focused through an imaging lens 1 onto an imaging surface of an imaging means 2 including a CCD, a CMOS sensor, or the like, and a luminance (Y) signal, for example, is obtained. Is converted to an electrical image signal consisting of two color difference (Cb, _Cr ) signals.

This image signal is supplied to the AZD conversion circuit 3, and the analog image signal is converted into digital image data. The converted image data is supplied to a camera signal processing circuit 4, where signal processing such as so-called key correction is performed by digital processing, and a normal image signal used for general-purpose video equipment is used. Is formed. Further, an output signal from the force camera signal processing circuit 4 is selected by a switch 5 and supplied to a chromatic aberration corrector 6. On the other hand, for example, using two sensors 7 P and 7 Y, pitch (P i t ch) and iodine (Y a w

) Angular velocity due to camera shake in the direction is detected, and this detection signal is supplied to, for example, a camera shake correction vector calculator 9 of the control micro computer 8. Further, a driving state such as a zoom focal length and a focus position of the photographing lens 1 is detected and supplied to the conversion ratio calculating unit 10. The driving state of the photographing lens 1 may be detected using, for example, an operation signal from a manual operation input unit 11 from a user.

For example, the calculation in the camera shake correction vector calculation unit 9 of the control microcomputer 8 is shown in, for example, the above [FIG. 5]. In the circuit configuration, an operation corresponding to the process shown by the dashed line is performed, whereby the angle information of the imaging lens 1 changed by the camera shake is extracted. Further, the camera shake correction vector calculated by the control microphone port computer 8 is supplied to, for example, the imaging means 2 to perform the camera shake correction.

At the same time, a shift vector at the center of the optical axis of the photographing lens 1 is obtained from the camera shake correction vector and supplied to the chromatic aberration corrector 6. That is, the camera shake correction vector corresponds to the movement of the center of the optical axis of the photographing lens 1, and for example, the position at which an image signal is taken out from the imaging means 2 is controlled in accordance with the camera shake correction vector. Thus, by inverting the sign of the shake correction vector, the shift vector at the center of the optical axis in the extracted image signal can be obtained.

Further, the conversion ratio for each color calculated by the control microcomputer 8 is supplied to the chromatic aberration corrector 6. That is, for example, [FIG

.4] Ratio of image change due to chromatic aberration K R, K B [Ratio of the size of the red (R) image when the size of the green (G) image is 1? :!? And the ratio (KB) of the size of the blue (B) image are determined according to the driving conditions such as the zoom focal length of the photographing lens 1, the force position, and the like. The ratio KR,

K B can be obtained.

Then, the chromatic aberration corrector 6 performs processing such as that shown in FIG. That is, the signal from the switch 5 is supplied to the matrix operation circuit 21 and, for example, from the above-mentioned luminance (Y) signal and two color difference (Cb, Cr) signals, for example, the three primary colors (R , G, B) signal. The converted three primary color (R, G, B) signals are written to the input side image memories 22 R, 22 G, 22 B, respectively, and the written image data is used to enlarge the image. Solution that performs Z reduction It is supplied to the image conversion circuit 23.

Further, the resolution conversion circuit 23 is supplied with the above-mentioned conversion ratio data and shift vector data of the optical axis of the photographing lens. In the resolution conversion circuit 23, for each of the red (R), green (G), and blue (B) images, the light in the image is calculated according to the shift vector data of the optical axis of the photographing lens described above. The position of the axis center is determined, and resolution conversion for enlarging / reducing the image is performed centering on this position in accordance with the data of the conversion ratio described above.

The image data from the resolution conversion circuit 23 is written to the image memories 24 R, 24 G, 24 B on the output side. The image memories 22R, 22G, 22B and 24R, 24G, 24B can be shared. Further, the image data written in the image memories 24 R, 24 G, and 24 B is read and supplied to the matrix operation circuit 25, for example, the three primary colors (R, The G, B) signal is converted into, for example, a luminance (Y) signal and two color difference (Cb, Cr) signals.

Accordingly, in the resolution conversion circuit 23, for example, an image having chromatic aberration as shown at the left end of B of FIG. 3 is compared with an image formed by ideal imaging as shown at A of FIG. If supplied, this image is decomposed into the three primary colors (R, G, B), of which the red (R) image is reduced, for example, and the blue (B) image is enlarged, The size is made equal. Further, the images of these three primary colors (R, G, B) are recombined to form an image close to an ideal image formed by ideal imaging as shown at the right end of B of FIG.

Further, by supplying this image data to the matrix operation circuit 25, the chromatic aberration corrector 6 re-creates an image close to an ideal image by the resolution conversion circuit 23 described above. The image data is again converted into, for example, a luminance (Y) signal and two color difference (Cb, Cr) signals and is extracted. The chromatic aberration corrector 6 The luminance (Y) signal and the two color difference (Cb, Cr) signals are selected as input signals to the chromatic aberration corrector 6 by the switching switches 12.

The signal selected by the switching switch 12 is supplied to the display processing circuit 13 and, for example, a luminance (Y) signal and two color difference (Cb, Cr) signals are converted into a predetermined display signal format. The displayed image data is supplied to a display device 14 such as a liquid crystal display to perform display. Alternatively, the signal selected by the switching switch 12 may be supplied to an external output means (not shown) and output to an external video device or the like.

The signal selected by the switch 12 is supplied to a data compression circuit 15, and the compressed image data is recorded through a data insertion circuit 16 into a flexible disk, a semiconductor memory, or the like. It is supplied to a medium recording / reproducing device 17. Further, a reproduced signal from the recording / reproducing device 17 is supplied to the data decompression circuit 18. Then, the expanded image data is supplied to the switching switch 5 so that it can be selected as the output signal from the above-mentioned force-measurement signal processing circuit 4.

Therefore, in this apparatus, for example, with respect to the image data captured by the imaging means 2, the chromatic aberration is corrected by the chromatic aberration correction unit 6 and displayed on the display device 14, and the corrected image is displayed. The image data is recorded on the recording medium by the recording / reproducing device 17. The chromatic aberration corrector 6 corrects the chromatic aberration of the image data reproduced from the recording medium by the recording / reproducing device 17, and displays the image data on the display device 14. Is recorded on a recording medium by the recording / reproducing device 17.

As a result, for example, even for image data recorded on a recording medium without correcting chromatic aberration at the time of shooting, the chromatic aberration of the image data is corrected and displayed on the display device 14, and the correction is performed. Sa The image data recorded on the recording medium can be rewritten by the recording / reproducing device 17 using the obtained image data. That is, in continuous shooting, when there is no time to perform correction during shooting, only recording is performed, and correction is performed during reproduction, and the correction data can be re-recorded.

In this case, for example, the data of the shift vector at the center of the optical axis at the time of shooting and the data of the conversion ratio are recorded together with the image data, so that the image data at the time of reproduction is recorded. The chromatic aberration can be corrected smoothly.

That is, in the above-described apparatus, for example, the data of the shift vector around the optical axis from the camera shake correction vector calculation unit 9 and the conversion ratio data from the conversion ratio calculation unit 10 are data I / 0 circuits. At 19, the data is converted into a predetermined data format, and the data is inserted into the image data from the data compression circuit 15 at a data insertion circuit 16 at a time. Further, at the time of reproduction, data included in a reproduction signal from the recording / reproducing device 17 is taken out by the data I / O circuit 19 and supplied to the chromatic aberration corrector 6.

As a result, if there is no time to perform correction at the time of shooting in continuous shooting or the like, for example, data of the shift vector around the optical axis at the time of shooting and data of the conversion ratio are recorded together with the image data. You. At the time of reproduction, the chromatic aberration correction processing of the image data can be smoothly performed by using the data of the shift vector at the center of the optical axis and the data of the conversion ratio recorded together, and the correction data can be obtained. Can be re-recorded.

However, such correction can be performed using the data of the shift vector at the center of the optical axis and the data of the conversion ratio at the time of shooting.

Only when recording / reproduction is performed with a camera device of —. In other words, the center of the optical axis of the taking lens is slightly different even for the same model, and data recorded by other camera devices cannot be corrected. Absent. Therefore, when it is determined that recording and reproduction are performed by the same camera device, for example, it is possible to record an ID code for each individual together with data.

Further, in the above-described apparatus, for example, an arbitrary user-to-interface input 20 is provided in the conversion ratio calculation unit 10. For example, the data of the conversion ratio is arbitrarily changed, and the correction ratio in the chromatic aberration correction unit 6 is changed. The rate can be set arbitrarily. Thus, for example, even in the case of image data recorded by another camera device or image data in which conversion ratio data is not recorded together, this user interface input 20 It is possible to perform desired correction by using.

Furthermore, when desired correction is performed using such a user-interface input 20, for example, chromatic aberration compensation is performed by arbitrarily switching the selection of image data with the switching switch 12. The image before the correction in the front part 6 and the image after the correction can be arbitrarily switched and displayed on the display device 14. As a result, the image before correction and the image after correction can be easily compared, and the user's operation when performing desired correction can be smoothly performed.

The selection of the image data at the switching switch 12 is performed, for example, when the display device 14 is used as a view finder, or when the already corrected image data is passed through the chromatic aberration correction unit 6. It is also used when the image is projected on the display device 14 without being used. It is also used when performing only recording without performing correction during shooting such as continuous shooting described above. However, if the chromatic aberration corrector 6 is provided with a through mode that outputs the input as it is, it can be used instead of the switch 12.

Therefore, in the above-described embodiment, means for enlarging or reducing an image for each color of the primary color signal, driving state of the photographing lens and camera shake By using a means for detecting the amount of correction and controlling a conversion coefficient for enlarging or reducing the image and the coordinates of the center of the optical axis in accordance with the detection output, image quality degradation caused by a miniaturized photographing lens is reduced. In addition to being able to make corrections by processing the captured image signal, good correction processing can be performed when camera shake correction is performed at the same time.o

As a result, in the conventional means, problems such as color blurring due to chromatic aberration of magnification and deterioration of image quality such as resolution degradation occur due to downsizing of the imaging lens, and such image quality deterioration is sufficiently suppressed only by the imaging lens. In particular, when such image quality deterioration correction is performed by enlarging or reducing the image of each color, there is a problem that camera shake correction cannot be performed at the same time. However, according to the present invention, these problems can be easily solved.

Thus, according to the above-described image photographing apparatus, a photographing lens, image pickup means for converting video light passing through the photographing lens into an electric image signal, camera signal processing means for processing the image signal, and camera Color signal conversion means for converting or inversely converting the output signal from the signal processing means into at least three primary color signals, resolution conversion means for enlarging or reducing an image for each color of the primary color signal, driving state of camera lens and camera shake By providing detection means for detecting the amount of correction, and control means for controlling a conversion coefficient for enlargement or reduction by the resolution conversion means and an optical axis center coordinate in accordance with a detection output from the detection means, for example, It can very well compensate for image quality degradation caused by miniaturized photographic lenses.

Further, according to the chromatic aberration correction method described above, there are provided a photographing lens, an image pickup unit for converting video light passing through the photographing lens into an electric image signal, and a force camera signal processing unit for processing the image signal. Imaging equipment The chromatic aberration correction method according to the above, wherein the output signal from the camera signal processing means is converted into at least three primary color signals, and the image is enlarged or reduced for each color of the primary color signals. By detecting the camera shake correction amount and controlling the enlargement or reduction conversion coefficient and the optical axis center coordinate in accordance with the detected output, it is possible to extremely satisfactorily correct image quality degradation caused by, for example, a miniaturized photographing lens. You can do it.

It should be noted that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

Claims

The scope of the claims

. With the taking lens

Imaging means for converting video light passing through the taking lens into an electrical image signal;

Force camera signal processing means for processing the image signal;

Color signal conversion means for converting or inversely converting an output signal from the camera signal processing means into at least three primary color signals;

Resolution conversion means for enlarging or reducing an image for each color of the primary color signal;

Detecting means for detecting a driving state of the photographing lens and a camera shake correction amount;

Control means for controlling a conversion coefficient for enlargement or reduction and an optical axis center coordinate in the resolution conversion means according to a detection output from the detection means;

An image capturing apparatus characterized by comprising:

Signal conversion means for converting or inversely converting an output signal from the resolution conversion means into an image signal for external output or recording;

External output means for outputting the image signal for external output, and recording / reproducing means for recording or reproducing the Z or the image signal for recording on a recording medium.

The image photographing apparatus according to claim 1, wherein an output signal from the camera signal processing means is recorded on the recording medium by the recording / reproducing means.

Information on the driving state of the photographing lens and the amount of camera shake detected by the detecting means during the photographing is recorded on the recording medium together with the output signal from the camera signal processing means.

3. The image photographing apparatus according to claim 2, wherein:

4. A switching means for switching between an output signal from the camera signal processing means and an image signal from any external input means or recording / reproducing means,

Supplying a signal from the switching means to the color signal converting means;

The control means is provided with a user interface for arbitrarily setting the conversion coefficient for enlargement or reduction and the center coordinate of the optical axis.

2. The image photographing apparatus according to claim 1, wherein:

5. In the recording medium reproduced by the recording / reproducing means, information of the driving state of the photographing lens and the amount of camera shake correction detected by the detecting means at the time of photographing the image signal is recorded together with the image signal, A conversion coefficient for enlargement or reduction by the resolution conversion means and an optical axis center coordinate are controlled in accordance with the information reproduced by the recording / reproduction means.

5. The image photographing device according to claim 4, wherein:

6. A method for correcting chromatic aberration in an image photographing apparatus, comprising: a photographing lens; an image pickup unit that converts video light passing through the photographing lens into an electric image signal; and a force signal processing unit that processes the image signal. So,

Converting the output signal from the camera signal processing means into at least three primary color signals;

In addition to enlarging or reducing the image for each color of the primary color signal,

The driving state of the photographing lens and the amount of camera shake correction are detected, and the enlargement or reduction conversion coefficient and the coordinates of the optical axis center are controlled according to the detection output.

A method for correcting chromatic aberration.

Converting an output signal from the resolution conversion means into an image signal for external output or recording;

Outputting the image signal for external output, and / or recording the image signal for recording on a recording medium

7. The chromatic aberration correction method according to claim 6, wherein:

Output signals from the camera signal processing means can be recorded on the recording medium,

8. The chromatic aberration correction method according to claim 7, wherein information on a driving state of the photographing lens and a camera shake correction amount detected at the time of photographing is recorded on the recording medium together with the output signal.

Switching means for switching between an output signal from the camera signal processing means and an image signal from an arbitrary external input or a recording medium,

Converting the signal from the switching means into at least three primary color signals;

While enlarging or reducing the image for each color of the primary color signal,

Arbitrary settings are made for the conversion coefficient for the enlargement or reduction and the optical axis center coordinates.

7. The chromatic aberration correction method according to claim 6, wherein:

0. In the recording medium, information of the driving state of the photographing lens and the amount of camera shake detected at the time of photographing the image signal are recorded together with the image signal,

Controlling the expansion or reduction conversion coefficient and the optical axis center coordinate according to the information to be reproduced

10. The chromatic aberration correction method according to claim 9, wherein: